JP2008302055A - Medical drainage defoaming device and drainage bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical drainage defoaming device and a drainage bag using the same for preventing drainage from flowing into a water seal part as foam along the upper part of a drainage bag. <P>SOLUTION: In the medical drainage defoaming device 20, an antifoaming agent holding body 22 for holding an antifoaming agent is disposed in a housing tube 34 provided with an inlet hole 38 and an outlet hole 42. The drainage bag 10 comprises a drainage tank 12 for storing the drainage, a flow-in port 14 which is formed at the upper part of the drainage tank 12 to make the drainage flow in, a water seal tank 16 connected to the upper part of the drainage tank 12 at a lower part, and a suction port 18 which is formed at the upper part of the water seal tank 16 and communicates with a negative pressure source. To the flow-in port 14, the outlet hole 42 in the medical drainage defoaming device 20 is connected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a medical defoaming device and a drainage bag, and more particularly to a medical drainage defoaming device used for a low-pressure suction / discharge device and a drainage bag using the same.

  2. Description of the Related Art Conventionally, a drainage bag used for collecting body fluid such as when removing body fluid such as blood that continues to exude in a body cavity of a patient from the body cavity is known. Such a drainage bag is provided with an inflow hole for inflow of body fluid, and this hole is connected to a catheter inserted into the body cavity of the patient. Body fluid generated on the patient side passes through the catheter, enters the inflow hole, and is guided into the drainage bag.

  The drainage bag is provided with a gas outlet hole for suction, and the hole communicates with an external negative pressure source. By reducing the pressure in the drainage bag and the body fluid passage, the body fluid in the body cavity is sucked and the body fluid is positively stored in the drainage bag. The drainage bag is provided with a water seal to prevent the gas from flowing back into the patient when the patient has a negative pressure higher than the suction pressure. The outlet hole is usually provided with an overflow prevention valve so that the drainage liquid in the drainage bag does not enter the negative pressure source.

Here, for example, in Patent Document 1, the inner surface of the drainage bag and the flow path of the drainage liquid are covered with a defoaming agent, and the bubbles sucked together with the drainage liquid are annihilated by a chemical action, so that the foam is in the water seal portion It has been proposed not to get in.
JP 2002-369879 A

  By the way, in the above-mentioned conventional drainage bag, since it has a structure in which drainage flows directly into the drainage bag, a foamy aspirate is mixed in this drainage, and postoperative drainage etc. If the foamed suction is sucked into the bag during the suction, the foamed suction is not dripped into the drainage tank before the drainage tank is full. It sometimes flowed into the water seal part.

  And the bubble entrained in the water seal part is mixed in the liquid tank on the negative pressure side of the water seal part and the liquid level becomes foamy, so that the apparent liquid level of the water seal part rises and is provided in the suction port In some cases, the overflow prevention valve is blocked by the bubbles and stops the suction from the suction port. On the other hand, if this bubble flows into the suction device of the negative pressure source from the suction port, it may cause contamination.

  Further, the drainage bag described in Patent Document 1 employs a configuration in which the inner surface of the drainage bag and the flow path of the drainage are covered with an antifoaming agent, but the surface area to be covered is limited. There is a tendency that the foaming agent tends to be insufficient, and the antifoaming agent and the foam are not sufficiently in contact with each other, so that the expected antifoaming action cannot be exhibited.

  The present invention has been made in view of the above-described circumstances, and by reducing bubbles in the drainage flowing into the drainage bag and changing the properties of the bubbles to a liquid that can easily flow down, the drainage is discharged as bubbles. It is an object of the present invention to provide a medical drainage defoaming apparatus that prevents a liquid bag from flowing into the water seal part along the upper part of the liquid bag and a drainage bag using the medical drainage defoaming apparatus.

The medical drainage defoaming apparatus and drainage bag according to the present invention employ the following means in order to solve the above problems.
The medical drainage defoaming apparatus according to the present invention is characterized in that an antifoaming agent holding body holding an antifoaming agent is disposed in a housing tube having an inlet hole and an outlet hole.
The drainage bag according to the present invention includes a drainage tank for storing drainage, an inlet formed at an upper part of the drainage tank and into which the drainage flows, and a lower part with respect to the upper part of the drainage tank. In a drainage bag comprising a connected water-sealed tank and a suction port formed in the upper part of the water-sealed tank and communicating with a negative pressure source, the medical drainage is disposed at the inlet. The outlet hole in the foam device is connected.

  According to the present invention, by introducing the drainage liquid into the housing tube from the inlet hole, the foamed suctioned substance accompanying the drainage contacts the antifoaming agent holding body that holds the antifoaming agent. And a foam-like suction thing is liquefied with an antifoamer, and is discharged | emitted from an exit hole. Therefore, according to the drainage bag of the present invention in which the outlet hole of such a defoaming device is connected to the inflow port, bubbles do not enter the water seal portion along the upper part of the drainage bag.

 Another medical drainage defoaming apparatus according to the present invention is characterized in that, in the above, the defoaming agent holder is formed by including a defoaming agent in a porous material.

  According to the present invention, an antifoaming agent can be held in a large number of minute pores or a large specific surface of a porous material such as a sponge material, a nonwoven fabric, paper, a filter such as a filtration membrane, and a sintered body. Therefore, the antifoaming agent can be held for a long time and a large contact area between the foam and the antifoaming agent can be secured.

 Another medical drainage defoaming apparatus according to the present invention is as described above, for drainage passage between a part of the defoaming agent holding body or between the antifoaming agent holding body and the inner surface of the housing tube. The passage is formed.

  According to the present invention, even if the porous material is clogged, the drainage can pass through the antifoaming agent holding body without passing through the inside of the antifoaming agent holding body. In the foam device, the flow of drainage is not blocked.

 Another medical drainage defoaming device according to the present invention is characterized in that, in the above, the defoaming agent holding body is formed by coating a defoaming agent on a honeycomb structure or a multi-bundle tube body. .

  According to the present invention, an antifoaming agent can be coated and included in a gap formed inside a structure having a large body surface area per unit volume, such as a honeycomb structure or a multi-bundle tube. As in the case of the porous material, the antifoaming agent can be held for a long time and a large contact area between the foam and the antifoaming agent can be secured.

According to the medical drainage defoaming apparatus of the present invention, the foam-like aspirate contained in the drainage is liquefied by the defoaming agent by coming into contact with the defoaming agent holding body holding the defoaming agent. It is discharged from the hole. Therefore, according to the drainage bag of the present invention in which such a defoaming device is attached to the inflow port, the defoaming is performed near the inflow port in the upper portion of the drainage tank and becomes liquid. For this reason, it is possible to prevent the bubbles that have entered from the inlet from flowing into the water-sealed tank along the upper part of the drainage bag and to prevent the bubbles from entering the water-sealed tank.
In addition, since the defoamer is contained in the drainage liquid in the drainage tank, the generation of foam can be suppressed even when bubbles are generated in the bag or even when the drainage liquid overflows and flows into the water seal part. .

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a front view showing an example of a drainage bag 10 according to the first embodiment, FIG. 2 is a longitudinal sectional view of the drainage bag 10, and FIG. It is the perspective view which showed an example of the structure of the defoaming apparatus (medical drainage defoaming apparatus) 20 which concerns on 1 embodiment.

  The drainage bag 10 is used for sucking and storing the drainage from the wound after the operation of the patient's lungs or the like. As shown in FIGS. 1 and 2, the drainage bag 10 is formed in a drainage tank 12 for storing drainage generated in the body cavity of a patient and an upper part of the drainage tank 12, and drains from the outside. Is formed at the upper part of the water sealing tank 16 and communicates with an external negative pressure source (not shown). The suction port 18 is integrally formed. An antifoaming device 20 including an antifoaming agent holding body 22 is externally connected to the inflow port 14.

  The drainage bag 10 is made of a transparent material so that the liquid level of the drainage accumulated in the drainage tank 12 can be observed from the outside. A transparent hard plastic is used so that the volume of the glass does not change. Examples of such plastics include polycarbonate, polysulfone, acrylic resin, polystyrene, and styrene-butadiene resin.

  The drainage tank 12 includes a first drainage tank 24 provided immediately below the inlet 14, and a second drainage tank 28 that is partitioned by a partition wall 26 and provided adjacent to the first drainage tank 24. The upper portions of the first drainage tank 24 and the second drainage tank 28 are in communication. A communication hole 30 extending in the lateral direction is provided in the upper part of the second drainage tank 28, and the communication hole 30 communicates with the upper end of the connection pipe 32 extending in the vertical direction. The connecting pipe 32 is connected to the lower part of the water sealing tank 16 at the lower end thereof.

  As shown in FIG. 3, the defoaming device 20 is configured by accommodating a sponge material 22 a as an antifoaming agent holding body 22 in a bottomed cylindrical housing tube 34. A small diameter inlet hole 38 is provided in the upper disk 36 of the housing tube 34, and a small diameter outlet hole 42 is provided in the lower disk 40.

The sponge material 22a is formed in a substantially cylindrical shape, has a flow path portion 44 that is punched in the vertical direction and opens concentrically as a passage for drainage, and contains an antifoaming agent. The outer peripheral surface of the sponge material 22 a is arranged so as to be matched with the inner peripheral surface of the housing tube 34.
A tube (not shown) from the patient side is connected to the inlet hole 38, and the outlet hole 42 is externally connected to the inlet 14 of the drainage bag 10. The patient-side drainage fluid is guided to a tube (not shown), enters the inlet hole 38, passes through the housing tube 34, and exits from the outlet hole 42.

The operation of the above configuration will be described.
When the foamed material sucked with the drainage enters the inlet hole 38 of the housing tube 34 of the defoaming device 20 and passes through the sponge material 22a, it comes into contact with the defoaming agent contained in the sponge material 22a. Liquefies by its chemical action. Then, this liquefied drainage liquid exits from the outlet hole 42 of the housing tube 34, enters the inlet 14 of the drainage bag 10, and drops into the first drainage tank 24.

Thus, since the foam is liquefied when passing through the housing tube 34 of the defoaming device 20 in front of the inlet 14, the drainage from the inlet 14 becomes foam in the first drainage tank 24. It does not enter the communication hole 30 along the upper part.
In addition, a part of the drained liquid that has entered the housing tube 34 of the defoaming device 20 can pass through the flow path portion 44 on the inner diameter side of the sponge material 22a, so that even if the sponge material 22a is clogged. The drainage passes through the flow path portion 44 and enters the inlet 14, and is dropped into the first drainage tank 24. For this reason, the flow path of the drainage can always be secured.

In the first embodiment, as the antifoaming agent holding body 22, a porous structure having a large specific surface area impregnated with an antifoaming agent instead of using the sponge material 22 a containing the antifoaming agent. Or you may make it use what impregnated the antifoamer to filters and sintered compacts, such as a nonwoven fabric, paper, and a filtration membrane.
Furthermore, as the structure of the antifoaming agent holding body, a structure having a large surface area / volume ratio per unit volume, such as a honeycomb structure or a multi-bundle tube in which a large number of tubes are bundled, is coated with an antifoaming agent. A structure filled with things may be used.

  Further, in the first embodiment, instead of providing the channel portion 44 opened concentrically in the substantially cylindrical sponge material 22a as the antifoaming agent holding body 22, an opening having an arbitrary shape penetrating in the vertical direction is provided. It may be provided to form a drainage flow path, and a drainage flow path may be secured by forming a notch in the outer peripheral portion of the sponge material 22a.

  Further, by making the outer diameter of the sponge material 22a slightly smaller than the diameter of the inner periphery of the housing tube 34, a clearance is formed between the sponge material 22a and the inner wall of the housing tube 34, thereby ensuring a drainage flow path. In any case, the same effects as those of the present invention can be obtained.

  In this way, by providing the flow path for drainage inside and outside the antifoaming agent holding body 22, even if some clogging occurs in the sponge material 22a, the liquid drainage is in the first drainage tank 24. You may make it flow down normally.

  Moreover, in the said 1st Embodiment, instead of accommodating the antifoamer holding body 22 in the housing pipe | tube 34 of the defoaming apparatus 20, an antifoaming is carried out in the middle of the tube connected to the drainage bag 10 and the inflow port 14. An agent holding body may be provided.

  As the antifoaming agent used in the present invention, an antifoaming agent that is usually used for coating on the surface of medical equipment in order to prevent foaming of the drainage can be used, and is not particularly limited. A silicone-based antifoaming agent may be used.

  As described above, in the drainage bag 10 according to the present invention and the defoaming device 20 used therefor, the foam-like suction material contained in the drainage is defoamed by the defoaming agent holder provided near the inflow port. Therefore, before the capacity of the drainage tank becomes full, the foamed suction material does not drip into the drainage tank and does not flow through the upper part of the drainage tank and flow into the water seal portion.

As described above, the drainage bag 10 according to the present invention and the defoaming device 20 used therefor are not entrained in the water-sealed tank, so that the overflow prevention valve provided in the suction port does not malfunction, and the foam Does not contaminate this by flowing into the suction device of the negative pressure source.
In addition, when the antifoaming agent holder is configured to hold the antifoaming agent in the porous material, honeycomb structure, or multi-bundle tube body, the antifoaming agent tends to be insufficient immediately during drainage suction. In addition, a sufficient contact area can be secured and the expected defoaming action can be exhibited.

Next, a second embodiment of the present invention will be described with reference to FIG.
The defoaming device 50 according to the second embodiment is different from the defoaming device 20 according to the first embodiment in that the housing tube 51 of the defoaming device 50 is formed in a tube shape and connected to the drainage bag 10. The outlet hole 52 is formed to have a length corresponding to the inlet 14 of the drainage bag 10, and an antifoaming agent holding body 53 is held in the outlet hole 52 by the annular protrusions 54A and 54B. The upstream side of the body 53 is a tube-shaped flexible inlet hole 55.
Others are the same as that of the defoaming apparatus 20 according to the first embodiment, and the description thereof is omitted.
According to the antifoaming device 50 according to the second embodiment, the antifoaming agent holding body 53 is disposed in the inflow port 14 of the drainage bag 10 and can be easily handled.
In addition, it is good also as a structure which forms the inlet hole 55 of the defoaming apparatus 50 short, connects with a general purpose tube, and is used.

Next, a third embodiment of the present invention will be described with reference to FIGS.
The defoaming device 60 according to the third embodiment is different from the defoaming device 20 according to the first embodiment in that the defoaming device 60 has wall portions of the outlet hole 62 and the inlet hole 65 as shown in FIG. Is the same diameter as the housing tube 61 and is formed in a cylindrical shape. An antifoaming agent holding body 63 is accommodated in the housing tube 61. Further, the defoaming device 60 is formed to be slightly smaller in diameter than the inlet hole 14 of the drainage bag 10 and shorter than the length of the inlet hole 14, and the storage defoaming device 60 can be stored in the inlet hole 14 of the drainage bag 10. It is said that.
Others are the same as that of the defoaming apparatus 20 according to the first embodiment, and the description thereof is omitted.

FIG. 6 shows a state in which the defoaming device 60 is accommodated in the inlet hole 14 of the drainage bag 10, and a length L that allows a tube to be connected to the upstream side of the defoaming device 60 in the inlet hole 14. Is secured.
Moreover, in order to hold | maintain the defoaming apparatus 60 reliably in the downstream edge part of the inlet hole 14 of the drainage bag 10, it is suitable for example that the holding | maintenance wall part 14A which protrudes to radial inside is suitable. It is.
According to the defoaming device 50 according to the third embodiment, since the defoaming device 60 is disposed in the inlet 14 of the drainage bag 10, it is easy to handle and prevents the defoaming device 60 from being damaged. Can do.

  Note that the shapes, combinations, operation procedures, and the like of the constituent members shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

It is a front view which shows an example of the drainage bag which concerns on 1st Embodiment. It is a longitudinal cross-sectional view of the drainage bag which concerns on 1st Embodiment. It is the perspective view which showed an example of the structure of the defoaming apparatus which concerns on 1st Embodiment. It is a longitudinal cross-sectional view which shows the outline of the defoaming apparatus and drainage bag which concern on 2nd Embodiment. It is a longitudinal cross-sectional view which shows the outline of the defoaming apparatus which concerns on 3rd Embodiment. It is a longitudinal cross-sectional view which shows the defoaming apparatus and drainage bag outline which concern on 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Drain bag 12 ... Drain tank 14 ... Inlet 16 ... Water-sealed tank 18 ... Suction port 20, 50, 60 ... Defoaming device (medical drainage defoaming device)
22, 53, 63 ... antifoam holder 22a ... sponge material (porous material)
34, 61 ... Housing pipe 38, 55, 65 ... Inlet hole 42, 52, 62 ... Outlet hole 44 ... Channel part (passage)

Claims (5)

  A medical drainage defoaming device, wherein an antifoaming agent holding body holding an antifoaming agent is disposed in a housing tube having an inlet hole and an outlet hole.  2. The medical drainage defoaming device according to claim 1, wherein the antifoaming agent holding body is formed by including a defoaming agent in a porous material.  The medical device according to claim 2, wherein a passage for drainage passage is formed between a part of the antifoaming agent holding body or between the antifoaming agent holding body and the inner surface of the housing tube. Drainage defoaming device.  2. The medical drainage defoaming device according to claim 1, wherein the antifoaming agent holding body is formed by coating a honeycomb structure or a multi-bundle tube with an antifoaming agent. A drainage tank for storing drainage,
An inlet formed at the top of the drainage tank and into which drainage flows;
A water-sealed tank connected at the lower part to the upper part of the drainage tank;
In a drainage bag configured to include a suction port that is formed in the upper part of the water sealing tank and communicates with a negative pressure source,
The drainage bag according to any one of claims 1 to 4, wherein the outlet hole of the medical drainage defoaming device according to any one of claims 1 to 4 is connected to the inflow port.

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